Fan is mechanical or auto

I have problems with the coolant system, is boiling or bubbling after an hour of driving plus my ac compressor sensor isn’t working I ordered the sensor will deliver tomorrow, I noticed the fan always is on and I don’t know if it’s because the coolant problem, ac compressor sensor or is mechanical and never stopped it any help please and thanks in advance

 

Cooling fan has a mechanical viscus clutch and will always be turning when the engine is running, speed will vary with temperature and engine speed.

The coolant bubbling could be a possible headgasket leak providing your radiator cap is good.

Are you losing coolant with no apparent external leaks?
Do you have a misfire on a cold start that goes away after a few seconds?